KR101444979B1 - Pharmaceutical compositions of entacapone, levodopa and carbidopa with improved bioavailability - Google Patents

Abstract

The present invention relates to a single oral dosage pharmaceutical composition comprising a combination of entacaine, levodopa, and carbidopa, or a salt thereof, in combination with at least one sugar alcohol, wherein entacain is co-micronized with at least one sugar alcohol. The compositions of the present invention exhibit biological equivalence to commercially available entacaines, levodopa, and carbidopa formulations, marketed under the trade designation Stalevo 200®. The present invention also relates to a process for preparing such compositions.

Description

[0001] PHARMACEUTICAL COMPOSITIONS OF ENTACAPONE, LEVODOPA AND CARBIDOPA WITH IMPROVED BIOAVAILABILITY [0002] FIELD OF THE INVENTION [0003]

The present invention relates to a single oral dosage pharmaceutical composition comprising a combination of entacaine, levodopa and carbidopa, or a salt thereof, in combination with at least one sugar alcohol, wherein the entacain is co-micronized with at least one sugar alcohol, micronization. The compositions of the present invention exhibit biological equivalence to commercially available entacaines, levodopa and carbidopa formulations, marketed under the trade designation Stalevo200®. The present invention also relates to a process for preparing such compositions.

Entacarpone, an inhibitor of catechol-O-methyltransferase (COMT), is a nitro-catechol structural compound used in the treatment of Parkinson's disease as an adjunct to levodopa / carbidopa therapy. Chemically, entacaine is (E) -2-cyano-3- (3,4-dihydroxy-5-nitrophenyl) -N, N-diethyl-2-propenamide :

Carbidopa, an inhibitor of aromatic amino acid decarboxylation, is a white crystalline compound sparingly soluble in water. Chemically, it is (-) - L- (? - hydrazino- (? -Methyl-? - (3,4-dihydroxybenzene) propanoic acid monohydrate having the following structure:

Levodopa, an aromatic amino acid, is a white crystalline compound resistant to water. Chemically, it is (-) - L- [alpha] -amino- [beta] - (3,4-dihydroxybenzene) propanoic acid having the following structure:

Entacaphone is a class IV drug under the biopharmaceutical classification system and has problems of low solubility, low dissolution rate and hence low bioavailability.

U.S. Patent No. 4,963,590 provides a pharmaceutical composition comprising an entacaine and a pharmaceutically acceptable carrier.

U.S. Patent Nos. 6,500,867 and 6,797,732 disclose oral solid pharmaceutical compositions comprising entacones, levodopa and carbidopa, or pharmaceutically acceptable salts or hydrates thereof, and pharmaceutically acceptable excipients. Both of these patents disclose that when carbidopa, levodopa, and entacapone are mixed together, there is a stability problem and the desired therapeutic effect is not achieved. On the other hand, when a substantial portion of the carbidopa is separated from levodopa and entacapone, the formulation exhibits better stability and a certain therapeutic effect is achieved.

U.S. Patent No. 6,599,530 discloses an oral compression composition in the form of tablets comprising a pharmaceutically acceptable salt of entacapone, nytecapone, or entacapone or nicalkone, and cocamellose sodium in an amount of at least 6% .

U.S. Application No. 20060222703 discloses oral pharmaceutical compositions of entacone, carbidopa and levodopa and microcrystalline cellulose and starch by simultaneously mixing all three active substances, entacornone, carbidopa and levodopa. The composition is prepared by compression granulation. This application describes drawbacks associated with wet granulation techniques, including reduced elution of levodopa, carbidopa and entacapone due to the use of water in a wet granulation process, and destabilization of the composition.

While it is known that micronization or milling of a substance in the presence of a surfactant or sugar can increase its solubility, these variables are not always suitable. For example, the bioavailability of micronized progesterone is not adequate and should be improved by, for example, dispersing in carnauba wax. This technique is disclosed in International Application Publication (PCT) No. 8902742. [ Thus, the properties of the material treated by micronization or milling, particularly its solubility and bioavailability, are not predictable and the opposite result can be obtained.

 Mannitol, sorbitol and the like as a filler in a preparation or as a sensory cue agent, that is, as a preparation for imparting a refreshing sensation to mouth in the case of an oral disintegration tablet, for example, (PCT) WO 2007080601, 2007001086, 2006057912; European Patent Nos. 589981 B1, 906089 B1, 1109534 B1; U.S. Patent No. 6,328,994 and U.S. Patent Application Nos. 20070196494, 20060240101, and 20060057199. Since sugar alcohols such as mannitol are used in most oral disintegrating preparations and oral disintegrating agents disintegrate in the mouth instead of disintegrating in the gastrointestinal tract as in the case of conventional fast disintegrating tablets, Do not use.

Summary of the Invention

In one general aspect there is provided a single oral dosage pharmaceutical composition comprising a combination of entacaine, levodopa, and carbidopa, or a salt thereof, in association with at least one sugar alcohol, wherein the entacapone is conjugated to at least one sugar alcohol It is refined.

Specific examples of pharmaceutical compositions may include one or more of the following features. For example, the pharmaceutical composition may further comprise one or more pharmaceutically acceptable excipients. Pharmaceutically acceptable excipients may include one or more binders, fillers, lubricants, disintegrants, lubricants, and the like.

In another general aspect there is provided a single oral dosage pharmaceutical composition comprising a combination of entacaine, levodopa, and carbidopa, or a salt thereof, in association with at least one sugar alcohol, wherein the entacapone is co- And the composition represents an elution profile in which more than 80% of the entacapone is released within 30 minutes and the release rate is determined by using device 2 (USP, elution, paddle, pellet) using 900 ml of pH 5.5 phosphate buffer at 37 & 50 rpm).

In another general aspect, there is provided a process for the preparation of a pharmaceutical composition comprising: (a) co-micronizing entacapone or a salt thereof with at least one sugar alcohol and mixing and granulating with other pharmaceutically acceptable excipients; (b) mixing and granulating the carbidopa and levodopa with other pharmaceutically acceptable excipients; (c) mixing the mixture of step (a) and step (b); And (d) forming the mixture of step (c) into a pharmaceutical formulation.

Specific examples of pharmaceutical compositions may include one or more of the following features. For example, pharmaceutically acceptable excipients may include one or more binders, fillers, lubricants, disintegrants, lubricants, and the like.

In another general aspect there is provided a single oral dosage pharmaceutical composition comprising a combination of entacaine, levodopa, and carbidopa, or a salt thereof, in association with at least one sugar alcohol, wherein the entacapone is co- And the composition shows no significant difference from that obtained by conventional entacapone, levodopa and carbidopa preparations marketed under the trade name Stalevo200® in one or both of the absorption rate and the degree of absorption of entacapone.

Specific examples of pharmaceutical compositions may include one or more of the following features. For example, the pharmaceutical composition may further comprise one or more pharmaceutically acceptable excipients. Pharmaceutically acceptable excipients may include one or more binders, fillers, lubricants, disintegrants, lubricants, and the like.

The details of one or more embodiments of the invention are set forth in the description that follows. Other features, objects, and advantages of the invention will be apparent from the description and the claims.

DETAILED DESCRIPTION OF THE INVENTION

We have found that the use of sugar alcohols such as mannitol or sorbitol with other known water insoluble drugs as physical mixtures or in complex forms such as phenobibrate, irbesartan, aripiprazole, , Respectively. It was also observed that there was no significant difference in the solubility or% release of these insoluble drugs whether these drugs were present alone or in association with the sugar alcohol.

As a result of studying the formulation of entacapone, levodopa, and carbidopa, the present inventors found that when entacornone is co-micronized with one or more sugar alcohols, entacapone is more effective than entacapone Surprisingly found a significant increase in the solubility of entacapone and the% drug release of entacaine from the combination of phon, levodopa and carbidopa preparations.

Stalevo 200® releases about 70% of the entacapone within 30 minutes, while the pharmaceutical composition of the invention releases about 85% of the entacapone within 30 minutes. This significant increase in the percent release of entacapone improves wettability, solubility and thus increases% release.

The inventors further discovered that the pharmaceutical compositions of this invention are biologically equivalent to commercially available combinations of entacone, carbidopa and levodopa (Stalevo 200®).

"Bioequivalence" means a 90% confidence interval (CI) of 0.80 to 1.25 for both the maximum plasma concentration (C _max ) and the under-curve area (AUC) under USFDA regulatory guidelines, or 90% CI for AUCs of 0.80 to 1.25, And a 90% CI for C _max of 0.70 to 1.43 under the European EMEA regulatory guidelines.

Bioequivalence studies have been conducted between Stalevo 200® and the compositions of the present invention. The study was monitored based on the C _max , AUC and maximum plasma concentration reach times (T _max ) achieved with the test product (the composition of the invention) and the reference product (Stalevo 200). Table 3 below provides the bioequivalence data of the composition of the invention and Stalevo 200 (R). Table 4 below provides the bioequivalence data for the test to reference (T / R) ratio at the 90% confidence interval.

In a single oral dosage pharmaceutical composition of the present invention, a substantial portion of entacaine or a salt thereof may be separated from levodopa and carbidopa, or a mixture of salts thereof; Or carbidopa or a salt thereof may be separated from a mixture of levodopa and entacapone, or a salt thereof; Or carbidopa, entacapone or levodopa may be present in the mixture at the same time.

As used herein, the term "substantial portion" of entacapone / carbidopa / levodopa or their salts refers to any of the entacone / carbidopa / levodopa in a single oral dose combination of entacaine, levodopa and carbidopa Refers to the amount of entacaine / carbidopa / levodopa or salts thereof that does not interfere with the stability or elution and therapeutic effects or bioavailability.

The composition of the present invention has a maximum plasma concentration (C _max ) of from about 1.1 μg / ml to about 2.0 μg / ml; A maximum plasma concentration reaching time (T _max ) of about 1.6 hours to about 3.5 hours; And it may exhibit pharmacokinetic profile characterized by about 1.8 ㎍.h / ㎖ to about 3.50 ㎍.h / ㎖ area under the concentration-time curve (AUC _{0 -t} and AUC _φ) of.

In the 90% confidence interval, the area under the concentration time curve of the composition of the present invention (AUC _{0 -t} and / or AUC _φ ) values may be from 0.70 to 1.30 as compared to that obtained by Stalevo 200®, The plasma concentration (C _max ) value may be between 0.60 and 1.40.

Suitable sugar alcohols may include one or more of mannitol, maltitol, maltol, sorbitol, lactitol, xylitol, and the like.

In the pharmaceutical compositions of the present invention, entacapone may be present in an amount for the sugar alcohol such that the molar ratio between the entacapone and the sugar alcohol is about 1: 1 to 10: 1.

The joint micronization may be performed by any suitable means known in the art including, but not limited to, one or more of a nano mill, a ball mill, an attritor mill, a vibration mill, a sand mill, a bead mill, a jet mill, .

The average particle size of entacaines and sugar alcohols obtained after co-micronization may be less than 30 mu.

The pharmaceutical composition may be prepared in two parts. The first portion may include co-micronizing the entarphon with one or more suitable sugar alcohols, granulating with a binder solution, and drying the granules. The dried granules may be milled and mixed with other suitable pharmaceutically acceptable excipients.

The second portion may include mixing levodopa and carbidopa with one or more suitable pharmaceutically acceptable excipients, and granulating with a binder solution. The granules can be dried. The dried granules may be milled and mixed with one or more appropriate pharmaceutically acceptable excipients.

The granules of entacapone and granules of levodopa and carbidopa may be mixed with the granules of granules of levodopa and carbidopa in the form of single layer tablets, double layer tablets, tablets, capsules, mini tablets, capsules, tablets in capsules, granules in capsules, pellets, And can be formulated into a formulation. In addition, the powder or granules may be suspended to obtain a pharmaceutically acceptable oral suspension.

The pharmaceutical composition may comprise one or more pharmaceutically acceptable excipients. Pharmaceutically acceptable excipients may include binders, lubricants, disintegrants, and lubricants.

Suitable binders may include one or more of povidone, starch, stearic acid, gum, hydroxypropylmethylcellulose, and the like.

Suitable fillers may include one or more of microcrystalline cellulose, lactose, mannitol, calcium phosphate, calcium sulfate, kaolin, dried starch, powdered sugar, and the like.

Suitable lubricants may include one or more of magnesium stearate, stearate, sodium stearate, calcium stearate, stearic acid, sodium stearyl fumarate, hydrogenated vegetable oils, and the like.

Suitable lubricants may be one or more of colloidal silicon dioxide, talc or corn starch, and the like.

A suitable disintegrant may be one or more of starch, croscarmellose sodium, crospovidone, sodium starch glycolate and the like.

Example 1 : The composition of the batch is given in Table 1 below. The following preparations are representative of the preferred compositions of the present invention. The preparation of Example 1 is described in detail below.

Table 1

Procedure: The pharmaceutical composition was prepared in two parts. The first part involved mixing the entacapone with mannitol and co-micronizing the premix through one or more cycles. Starch, croscarmellose sodium and sodium starch glycolate were mixed in a high speed mixing granulator, granulated with a povidone aqueous solution, and then the granules were dried in a fluid bed dryer.

The second part involved mixing levodopa, carbidopa with starch, granulating with a povidone aqueous solution, and drying in a fluid bed dryer. The dried granules of entacapone and levodopa and carbidopa were combined and blended with starch glycolate, mannitol, microcrystalline cellulose and talc in a double conical blender and lubricated with magnesium stearate. The lubricated granules were compressed into tablets using the appropriate tool and coated with an aqueous dispersion of Opadry.

Table 2 : Comparative dissolution data of the compositions of the invention prepared according to Example 1 against Stalevo 200®. For the measurement of the drug release rate, USP Type 2 apparatus (rpm 50) was used and 1000 ml of pH 5.5 phosphate buffer at 37 ° C ± 0.5 ° C was used as the medium.

Table 3 : Bioequivalence data of the composition of the present invention against Stalevo 200® for pharmacokinetic variables

Table 4 : Biological equivalence data on test (composition of the invention) versus reference (Stalevo 200®) ratio (T / R ratio) at 90% confidence interval

While the invention has been described in terms of specific embodiments, it is evident to those skilled in the art that various modifications and equivalents may be resorted to, and are intended to be included within the scope of the present invention.

Claims (19)

A single oral dose pharmaceutical composition comprising a combination of entacaine, levodopa, and carbidopa, or a salt thereof, together with one or more sugar alcohols, wherein the entacapone is co-micronized with one or more sugar alcohols . The pharmaceutical composition of claim 1, wherein the entacaine and the sugar alcohol are present in a molar ratio of 1: 1 to 10: 1. The pharmaceutical composition according to claim 1, wherein the sugar alcohol comprises at least one of mannitol, maltitol, maltol, sorbitol, lactitol and xylitol. The pharmaceutical composition of claim 1, wherein the co-micronized entacaine and sugar alcohol mixture has an average particle size of less than 30 microns. The pharmaceutical composition of claim 1 comprising at least one of tablets, capsules, powders, disks, caplets, granules, pellets, granules in capsules, mini tablets, mini capsules within capsules, pellets in capsules and sachets Composition. The pharmaceutical composition of claim 1, further comprising one or more pharmaceutically acceptable excipients. The pharmaceutical composition of claim 1, wherein a substantial portion of the entacapone or salt thereof is separated from a mixture of levodopa and carbidopa, or a salt thereof. The pharmaceutical composition according to claim 1, wherein a substantial portion of the carbidopa or a salt thereof is separated from a mixture of entacaine and levodopa, or a salt thereof. The method according to claim 1, wherein at least 80% of the entacapone is released within 30 minutes, wherein the release rate is determined by measuring the release rate of the device 2 (USP, elution) using 900 ml of pH 5.5 phosphate buffer at 37 & , Paddle, 50 rpm). The method according to claim 1,
(a) co-micronizing entacapone or a salt thereof with one or more sugar alcohols, mixing and granulating with other pharmaceutically acceptable excipients;
(b) mixing and granulating the carbidopa and levodopa with other pharmaceutically acceptable excipients;
(c) mixing the mixture of step (a) and step (b); And
(d) forming the mixture of step (c) into a pharmaceutical formulation
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